My new favorite thing is 1/2 pint wide mouth mason jars! I recently purchased a whole dozen of them. I pack my lunch using them and they are perfect for taking a 1/2 pints worth of cooked veggies or fruit or berries in or today I took a baked potato to work and used them to pack the butter. And I store my homemade peanut butter in them. Now if only the Ball/Kerr folks would make a sandwiched size jar. These jars are great- under $9 for a dozen- Cheaper than Glad or Ziplock brand plastic food savers or anything by Rubbermaid, Microwavable too! They also come in other sizes- Jelly jars (12oz, 8oz and 4 oz) are great for putting some milk or other beverage in, and quart and pint jars for larger amounts-for leftovers and such. And of course there is nothing wrong with reusing jars to pack food in! I love my jars! I often wash old food jars when I run a load in the dishwasher- first soak the label and peel it off and just wash. Then reuse the jar!